The U.S. Department of Defense is inviting design and manufacturing proposals for training ammunition that would contain seeds that can eventually sprout into plants.

In a call for proposals published Nov. 30, 2016 on the website of the government’s Small Business Innovation Research (SBIR) program, the Department of Defense outlines the objective of developing “biodegradable training ammunition loaded with specialized seeds.”

The report observes that the U.S. Army“manufactures and consumes hundreds of thousands of training rounds” which include small bullets as well as “40mm grenades… shoulder-launched munitions; 120mm tank rounds; and 155mm artillery rounds.”